arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2012.12331eess.SPcs.SYeess.SY
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实时车载无线系统级仿真

Real-Time Vehicular Wireless System-Level Simulation

Anja Dakić, Markus Hofer, Benjamin Rainer, Stefan Zelenbaba, Laura Bernadó, Thomas Zemen

AI总结:

本文提出一种实时车载无线系统级仿真方法,利用GSCM提取压缩信道参数并通过查表获得FER,经验证与实测FER高度吻合。

摘要:

未来用于高级驾驶辅助系统(ADAS)的自动化和控制单元将通过无线通信链路与附近车辆交换传感器和运动学数据,以提高交通安全。本文提出了一种精确的实时系统级仿真,用于多车辆通信场景,以支持互联ADAS系统的开发与测试。物理层和数据链路层被抽象化,并向网络仿真器提供帧错误率(FER)。FER受到车载无线通信信道非平稳双弥散衰落过程的强烈影响。我们采用基于几何的随机信道模型(GSCM),以实现对非平稳车载衰落过程的简化但仍准确的表示。GSCM的传播路径参数被用于在运行时高效计算每条通信链路每个平稳区域内随时间变化的压缩无线信道参数。五个压缩无线信道参数主要决定FER,并构成参数向量:路径损耗、均方根时延扩展、多普勒带宽、$K$因子和视距多普勒频移。我们使用信道仿真器和给定的收发信机调制解调器对,在参数向量的预定义离散网格点上测量FER。FER数据存储在表中,并在实时系统级仿真运行时进行查表。我们使用来自街道交叉口场景的经验测量数据验证了所提方法,结果表明仿真与测量在FER方面具有高度一致性。

英文摘要:

Future automation and control units for advanced driver assistance systems (ADAS) will exchange sensor and kinematic data with nearby vehicles using wireless communication links to improve traffic safety. In this paper we present an accurate real-time system-level simulation for multi-vehicle communication scenarios to support the development and test of connected ADAS systems. The physical and data-link layer are abstracted and provide the frame error rate (FER) to a network simulator. The FER is strongly affected by the non-stationary doubly dispersive fading process of the vehicular radio communication channel. We use a geometry-based stochastic channel model (GSCM) to enable a simplified but still accurate representation of the non-stationary vehicular fading process. The propagation path parameters of the GSCM are used to efficiently compute the time-variant condensed radio channel parameters per stationarity region of each communication link during run-time. Five condensed radio channel parameters mainly determine the FER forming a parameter vector: path loss, root mean square delay spread, Doppler bandwidth, $K$-factor, and line-of-sight Doppler shift. We measure the FER for a pre-defined set of discrete grid points of the parameter vector using a channel emulator and a given transmitter-receiver modem pair. The FER data is stored in a table and looked up during run-time of the real-time system-level simulation. We validate our methodology using empirical measurement data from a street crossing scenarios demonstrating a close match in terms of FER between simulation and measurement.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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